<template>
  <div>
    <h2 @click="handler">我是一个孩子组件</h2>
  </div>
</template>

<script>
export default {
  methods: {
    handler() {
      this.$bus.$emit("big", 233, 343);
    },
  },
};
</script>

<style lang="less" scoped></style>
